"And you won't know a thing till you get inside." (Mystery lyrics; name that song.)

"Drizzle, drazzle, drozzle, drome; time for this one to come home."

To make Runebound harder, try the Threat Track. It's included in the defunct Midnight expansion, but you can also find it in the BGG files section (on the Runebound page). It's easy to use, and it adds as much time pressure to the game as you want. Works solo or with other players (it really helps when playing solo).

Isle of dread is good, but has a serious flaw IMO.Green are OK, yellow are okay...Then you get straight to red because there are no "blue" per say. They are replaced by sea adventures which are all over the place in difficulty.You therefore get stuck longer doing yellow than in the regular game.

And then there is another level even more difficult than the red: the silver level. The expansion requires you to tackle around 2 of these real hard adventures with no rest between fights before you tackle the final monster, which makes margath look easy in comparison.You need to be of a really high level to tackle the silver encounters. There's not enough red card to make you level quickly. So you might turn over the red deck three times in a single game...

Its just that the progression is not smooth. Green... yellow... yellow... yellow... red... red.. red... red... silver.